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Examples of body diagrams12/15/2023 ![]() ![]() (c) Suppose we are given the piano’s mass and asked to find the tension in the rope. All other forces, such as the nudge of a breeze, are assumed to be negligible. (b) Arrows are used to represent all forces: T → T → is the tension in the rope above the piano, F → T F → T is the force that the piano exerts on the rope, and w → w → is the weight of the piano. Whenever sufficient information exists, it is best to label these arrows carefully and make the length and direction of each correspond to the represented force.įigure 6.2 (a) A grand piano is being lifted to a second-story apartment. Then, as in Figure 6.2(b), we can represent all forces with arrows. Once we have determined that Newton’s laws of motion are involved (if the problem involves forces), it is particularly important to draw a careful sketch of the situation. Let’s apply this problem-solving strategy to the challenge of lifting a grand piano into a second-story apartment.
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